2nd Croatian Conference on Earthquake Engineering 2CroCEE

The impact of present building code requirements for seismic design in new buildings can readily be acknowledged, however applying regulation to existing buildings is an area less well defined. Presently, there is a diverse list of existing code references which could be interpreted to require seismic upgrades of existing structures. Unfortunately, these references do not provide a clear path toward addressing the hazards, evaluation and retrofitting of existing buildings. And when it comes to existing historic buildings and monuments, the topic becomes much more complex and challenging. The problem of earthquake protection of historic buildings and monuments is radically different from that of other existing structures, due to the priority given to preservation of aesthetic, architectonic and historic values instead of keeping the structure operational. In providing the protection of these structures in a manner that requires the least intervention and the greatest care to preserve authenticity, the experts are permanently challenged by the fast development and the improved performance of new materials and techniques. However, the implementation of retrofitting methodology depends on the extent it has been investigated.
Within the frames of IZIIS ’research activities, in addition to seismic design of modern structures, particularly noteworthy is also the experience gathered in the field of seismic strengthening of existing structures as well as protection of cultural historic monuments. Important scientific research projects, involving analytical and unique experimental investigation and extensive research activities resulted on developing of a procedure for seismic retrofitting. This paper presents the integrated multidisciplinary approach to seismic protection of structures that has been developed by the Institute and implemented in the process of seismic upgrading or reconstruction of important buildings and monuments in the country and beyond.